Midas Code, Boyd Morrison

Also published as THE VAULT.

Top army engineer Tyler Locke is given a mysterious ancient manuscript. Written in Greek, it initially seems indecipherable. But with the help of classics scholar Stacy Benedict, Locke comes to understand that this manuscript could provide the clues to the greatest riches known to mankind - the legendary treasure of King Midas. However, there are others who are also hot on the trail - and it rapidly becomes a race against time to crack a code that is both fiendishly difficult and potentially deadly...A sweeping, gripping read, The Midas Code blends fascinating incidents from myth and legend with a modern plot that will have you guessing to the very last page.